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Relevant bibliographies by topics / MRI-guided / Dissertations / Theses

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Dissertations / Theses on the topic 'MRI-guided'

Author: Grafiati

Published: 23 June 2021

Last updated: 29 July 2025

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1

Saikus, Christina Elena. "Towards mri-guided cardiovascular interventions." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/44912.

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Imaging guidance may allow minimally invasive alternatives to open surgical exposure and help reduce procedure risk and morbidity. The inherent vascular and soft-tissue contrast of MRI make it an appealing imaging modality to guide cardiovascular interventional procedures. Advances in real-time MRI have made MRI-guided procedures a realistic possibility. The MR environment, however, introduces additional challenges to the development of compatible, conspicuous and safe devices. The overall goal of this work was to enable selected MRI-guided cardiovascular interventional procedures with cle

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Chen, Xuefeng S. B. Massachusetts Institute of Technology. "Instrument guide for MRI-guided percutaneous interventions." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/59900.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2010.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 50).<br>As MRI guided interventions are becoming more widely practiced, the goal of this thesis was to design an instrument guidance device for MRI-guided percutaneous interventions in closed bore systems, namely cryoablation procedures where multiple probes need to be placed to treat a tumor. Multiple meetings with researchers and clinicians the Brigham and Women's Hospital were conducted to understand the challenges c

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Zrinzo, L. "MRI guided and MRI verified deep brain stimulation : accuracy, safety and efficacy." Thesis, University College London (University of London), 2011. http://discovery.ucl.ac.uk/1325642/.

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This thesis investigates a systematic approach to the use of MRI-guided and MRI-verified deep brain stimulation (DBS) in clinical practice. The concept of individual targeting of visualised brain structures without microelectrode recording (MER) was examined with respect to accuracy, safety and efficacy. Accurate MRI localisation of the pedunculopontine nucleus, an investigational new DBS target for parkinsonian gait disorders, is described and proof-of-principle confirmed in a cadaver study using MR-microscopy and histological examination. The impact of surgical trajectory on stereotactic acc

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4

North, Oliver John. "Medical robotics for use in MRI guided endoscopy." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/23924.

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Interventional Magnetic Resonance Imaging (MRI) is a developing field that aims to provide intra-operative MRI to a clinician to guide diagnostic or therapeutic medical procedures. MRI provides excellent soft tissue contrast at sub-millimetre resolution in both 2D and 3D without the need for ionizing radiation. Images can be acquired in near real-time for guidance purposes. Operating in the MR environment brings challenges due to the high static magnetic field, switching magnetic field gradients and RF excitation pulses. In addition high field closed bore scanners have spatial constraints that

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Galassi, Francesca. "Instrument tracking and navigation for MRI-guided interventions." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/17822.

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Interventional MRI requires accurate and fast localization of medical instruments within the imaging volume of the MR scanner. Furthermore, in view of tissue motion and target dislocation, accurate intra-operative imaging is demanded. The research presented in this thesis addresses these issues with reference to a proposed MRI-guided transrectal prostate biopsy system. As the instrument is not visible in the MR images, RF fiducial markers embedded within the instrument are used to determine its pose. A novel localization method to compute the location of N fiducial markers using 1D projections

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6

Tse, Tsz Ho. "Medical robots for MRI guided diagnosis and therapy." Thesis, Imperial College London, 2009. http://hdl.handle.net/10044/1/5643.

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Magnetic Resonance Imaging (MRI) provides the capability of imaging tissue with fine resolution and superior soft tissue contrast, when compared with conventional ultrasound and CT imaging, which makes it an important tool for clinicians to perform more accurate diagnosis and image guided therapy. Medical robotic devices combining the high resolution anatomical images with real-time navigation, are ideal for precise and repeatable interventions. Despite these advantages, the MR environment imposes constraints on mechatronic devices operating within it. This thesis presents a study on the desig

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Franco, Enrico. "Robotic assistant for MRI-guided ablation of the liver." Thesis, Imperial College London, 2015. http://hdl.handle.net/10044/1/54890.

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Robotic devices represent a promising solution to the space limitations of cylindrical MRI scanners, potentially allowing more accurate and faster intervention for the benefit of patients and clinicians. This thesis presents the design, control, and experimental evaluation of a robotic assistant for MRI-guided percutaneous intervention of the liver. The robot provides remotely controlled alignment of a needle guide inside the MRI scanner bore and employs manual needle insertion outside the bore. A graphical user interface allows planning the procedure based on the MR images. A systems engineer

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Tzifa, Aphrodite. "MRI-guided or assisted interventions for congenital heart disease." Thesis, King's College London (University of London), 2013. https://kclpure.kcl.ac.uk/portal/en/theses/mriguided-or-assisted-interventions-for-congenital-heart-disease(24bf0db5-6737-4bcd-94d7-ec3bb9704fda).html.

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Congenital heart disease occurs in 0.8-1% of children. A proportion of these patients will require interventional treatment in the form of cardiac catheterisation or surgery, whilst some will only require medical therapy. Echocardiography is the investigation of choice for diagnosis and follow-up of these patients, whilst magnetic resonance imaging (MRI) is now increasingly used in most centres to assess complex congenital cases and to answer specific questions, not possible to address with echocardiography. The ability to obtain anatomical together with quantitative physiological information,

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9

Breen, Michael Scott. "TISSUE RESPONSE TO INTERVENTIONAL MRI-GUIDED THERMAL ABLATION THERAPY." Case Western Reserve University School of Graduate Studies / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=case1080938405.

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10

Li, Gang. "Robotic System Development for Precision MRI-Guided Needle-Based Interventions." Digital WPI, 2016. https://digitalcommons.wpi.edu/etd-dissertations/341.

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"This dissertation describes the development of a methodology for implementing robotic systems for interventional procedures under intraoperative Magnetic Resonance Imaging (MRI) guidance. MRI is an ideal imaging modality for surgical guidance of diagnostic and therapeutic procedures, thanks to its ability to perform high resolution, real-time, and high soft tissue contrast imaging without ionizing radiation. However, the strong magnetic field and sensitivity to radio frequency signals, as well as tightly confined scanner bore render great challenges to developing robotic systems within MRI en

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11

Cole, Gregory. "Modular MRI Guided Device Development System: Development, Validation and Applications." Digital WPI, 2013. https://digitalcommons.wpi.edu/etd-dissertations/91.

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Since the first robotic surgical intervention was performed in 1985 using a PUMA industrial manipulator, development in the field of surgical robotics has been relatively fast paced, despite the tremendous costs involved in developing new robotic interventional devices. This is due to the clear advantages to augmented a clinicians skill and dexterity with the precision and reliability of computer controlled motion. A natural extension of robotic surgical intervention is the integration of image guided interventions, which give the promise of reduced trauma, procedure time and inaccuracies. Des

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12

Su, Hao. "Force Sensing and Teleoperation of Continuum Robot for MRI-Guided Surgery." Digital WPI, 2013. https://digitalcommons.wpi.edu/etd-dissertations/156.

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Percutaneous needle placement, a minimally invasive procedure performed dozens of millions in the U.S. each year, relies on dedicated skill and long-term training due to difficult control of needle trajectory inside tissue and mental registration of images to locations inside the patient. Inaccurate needle placement may miss cancer tumors during diagnosis or eradicate healthy tissue during therapy. MRI provides ideal procedure guidance with the merit of excellent soft tissue contrast and volumetric imaging for high spatial resolution visualization of targets and surgical tool. However, manual

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Ji, Wenzhi. "Reconfigurable Fiducial-Integrated Modular Needle Driver For MRI-Guided Percutaneous Interventions." Digital WPI, 2013. https://digitalcommons.wpi.edu/etd-theses/303.

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Needle-based interventions are pervasive in Minimally Invasive Surgery (MIS), and are often used in a number of diagnostic and therapeutic procedures, including biopsy and brachytherapy seed placement. Magnetic Resonance Imaging (MRI) which can provide high quality, real time and high soft tissue contrast imaging, is an ideal guidance tool for image-guided therapy (IGT). Therefore, a MRI-guided needle-based surgical robot proves to have great potential in the application of percutaneous interventions. Presented here is the design of reconfigurable fiducial-integrated modular needle driver for

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Bove, Christopher. "Constrained Motion Planning System for MRI-Guided, Needle-Based, Robotic Interventions." Digital WPI, 2018. https://digitalcommons.wpi.edu/etd-theses/310.

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In needle-based surgical interventions, accurate alignment and insertion of the tool is paramount for providing proper treatment at a target site while minimizing healthy tissue damage. While manually-aligned interventions are well-established, robotics platforms promise to reduce procedure time, increase precision, and improve patient comfort and survival rates. Conducting interventions in an MRI scanner can provide real-time, closed-loop feedback for a robotics platform, improving its accuracy, yet the tight environment potentially impairs motion, and perceiving this limitation when planning

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Greigarn, Tipakorn. "Kinematics, Planning, and Perception for Magnetically-Actuated MRI-Guided Continuum Robots." Case Western Reserve University School of Graduate Studies / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=case1516966124689598.

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Tuna, Eser Erdem. "PERCEPTION AND CONTROL OF AN MRI-GUIDED ROBOTIC CATHETER IN DEFORMABLE ENVIRONMENTS." Case Western Reserve University School of Graduate Studies / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=case1619795928790909.

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17

Wartenberg, Marek. "Towards Hands-On Cooperative Control for Closed-Loop MRI-Guided Targeted Prostate Biopsy." Digital WPI, 2018. https://digitalcommons.wpi.edu/etd-dissertations/94.

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Intra-operative imaging is sometimes available to assist in needle biopsy, but typical open- loop insertion does not account for unmodeled needle deflection or target shift. Robotic closed-loop compensation for deviation from an initial straight-line trajectory can reduce the targeting error, using image-guidance for rotational control of an asymmetric bevel tip. By pairing closed-loop trajectory compensation with a hands-on cooperatively controlled needle insertion, a physician's control of the procedure can be maintained while incorporating benefits of robotic accuracy. Additional

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18

Kemper, Corey Ann 1979. "Incorporation of diffusion tensor MRI in non-rigid registration for image-guided neurosurgery." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/87365.

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19

Fernandez-Gutierrez, Fabiola. "Workflow analysis, modelling and simulation for improving conventional and MRI-guided vascular interventions." Thesis, University of Dundee, 2014. https://discovery.dundee.ac.uk/en/studentTheses/6b7fca49-19ba-47b0-831a-ca9677084a7a.

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This thesis proposes a multidirectional methodological framework for a comprehensive ergonomic analysis and modelling of workflow for multi-modal vascular image-guided procedures (IGPs). Two approaches are employed to analyse the workflow: Discrete Event Simulation (DES) and purpose-oriented physical models. In contrast to previous studies, the proposed methodology looks in detail the actions carried out within the intervention rooms and the clinical experience during the procedures with three main objectives: to provide a deeper understanding of vascular procedures, to predict the impact of p

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Tilak, Gaurie. "Comparison of Robotic and Manual Needle-Guide Templates in MRI-Guided Transperineal Prostate Biopsy." Thesis, Harvard University, 2017. http://nrs.harvard.edu/urn-3:HUL.InstRepos:32676111.

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Purpose: Demonstrate the utility of a robotic needle-guidance template as compared to a manual template for in-bore 3T transperineal MR guided prostate biopsy. Materials and Methods: This non-randomized two-arm trial included 99 cases of targeted transperineal prostate biopsies. The biopsy needles were aimed to suspicious foci in multiparametric 3T MRI using a manual template before a cut-off date or a robotic template after the date. The following data was obtained: the accuracy of average and closest needle placement to the focus, cancer yield, percentage of cancer volume in positive core s

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Treat, Lisa Hsu. "Advances in targeted chemotherapy using MRI-guided focused ultrasound to disrupt the blood-brain barrier." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/47849.

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Thesis (Ph. D.)--Harvard-MIT Division of Health Sciences and Technology, 2009.<br>Includes bibliographical references (p. 107-121).<br>The clinical application of chemotherapy to brain malignancies has been severely limited because many potential therapeutic agents are typically unable to penetrate the blood-brain barrier (BBB). A novel approach to overcome this barrier uses focused ultrasound to induce localized BBB disruption in a targeted region of the brain and magnetic resonance imaging (MRI) to guide and monitor the procedure. The purpose of this thesis was to develop a technique using M

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Sokka, Shunmugavelu D. (Shunmugavelu Doraivelu) 1975. "Design and evaluation of linear intracavitary ultrasound phased array for MRI-guided prostate ablative therapies." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/80207.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.<br>Includes bibliographical references (p. 76-82).<br>by Shunmugavelu D. Sokka.<br>S.M.

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Cash, Hannes [Verfasser]. "Implications of MRI/ultrasound fusion guided targeted biopsies on the diagnostics of prostate cancer / Hannes Cash." Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2018. http://d-nb.info/1150238011/34.

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24

Busse, Harald, Tim Riedel, Nikita Garnov, Gregor Thörmer, Thomas Kahn, and Michael Moche. "Targeting accuracy, procedure times and user experience of 240 experimental MRI biopsies guided by a clinical add-on navigation system." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-176108.

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Objectives: MRI is of great clinical utility for the guidance of special diagnostic and therapeutic interventions. The majority of such procedures are performed iteratively (\"in-and-out\") in standard, closed-bore MRI systems with control imaging inside the bore and needle adjustments outside the bore. The fundamental limitations of such an approach have led to the development of various assistance techniques, from simple guidance tools to advanced navigation systems. The purpose of this work was to thoroughly assess the targeting accuracy, workflow and usability of a clinical add-on navigati

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Plaha, Puneet. "Stereotactic MRI guided targeting and stimulation of the caudal zona incerta nucleus in patients with movement disorders." Thesis, University of Bristol, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.540885.

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26

Ma, Yunzhao. "Passive Resonant Coil Based Fast Registration And Tracking System For Real-Time Mri-Guided Minimally Invasive Surgery." Digital WPI, 2013. https://digitalcommons.wpi.edu/etd-theses/867.

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"This thesis presents a single-slice based fast stereotactic registration and tracking technique along with a corresponding modular system for guiding robotic mechanism or interventional instrument to perform needle-based interventions under live MRI guidance. The system can provide tracking of full 6 degree-of-freedom (DOF) in stereotactic interventional surgery based upon a single, rapidly acquired cross-sectional image. The whole system is constructed with a modular data transmission software framework and mechanical structure so that it supports remote supervision and manipulation between

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Mewes, André [Verfasser], and Christian [Gutachter] Hansen. "Projector-based augmented reality and touchless interaction to support MRI-guided interventions / André Mewes ; Gutachter: Christian Hansen." Magdeburg : Universitätsbibliothek Otto-von-Guericke-Universität, 2019. http://d-nb.info/1219965804/34.

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Mylonas, Nicos. "Development of positioning devices for MRI-guided high intensity focused ultrasound (HIFU) for abdominal, thyroid and brain, tumours." Thesis, City University London, 2012. http://openaccess.city.ac.uk/2417/.

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High intensity focused ultrasound (HIFU) is a promising technology for a variety of therapeutic applications. This concept initiated in 1942 by Lynn Zwemer [1]. HIFU has long been known as a minimal invasive or non-invasive procedure that destroys tissue through ablation. However, it is only in recent years that clinical applications are becoming feasible, with the development of high power ultrasound transducers compatible with the MRI scanner which is used to monitor these non-invasive HIFU applications. New technologies, combined with more sophisticated treatment methods and monitoring meth

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Köhler, Benjamin [Verfasser], and Bernhard [Akademischer Betreuer] Preim. "Guided qualitative and quantitative analysis of cardiac 4D PC-MRI blood flow data / Benjamin Köhler ; Betreuer: Bernhard Preim." Magdeburg : Universitätsbibliothek, 2016. http://d-nb.info/1118572181/34.

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Chen, Yi [Verfasser]. "Mapping the local and brain-wide network effects by optogenetic activation with an MRI-guided robotic arm / Yi Chen." Tübingen : Universitätsbibliothek Tübingen, 2020. http://d-nb.info/1214640044/34.

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Shang, Weijian. "Teleoperation of MRI-Compatible Robots with Hybrid Actuation and Haptic Feedback." Digital WPI, 2015. https://digitalcommons.wpi.edu/etd-dissertations/49.

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Image guided surgery (IGS), which has been developing fast recently, benefits significantly from the superior accuracy of robots and magnetic resonance imaging (MRI) which is a great soft tissue imaging modality. Teleoperation is especially desired in the MRI because of the highly constrained space inside the closed-bore MRI and the lack of haptic feedback with the fully autonomous robotic systems. It also very well maintains the human in the loop that significantly enhances safety. This dissertation describes the development of teleoperation approaches and implementation on an example system

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Salomir, Rares. "Local hyperthermia by MRI-guided focused ultrasound : fast MR-thermometry and on-line temperature control : feasibility studies of tumor thermal ablation." Bordeaux 1, 2001. http://www.theses.fr/2001BOR12418.

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La destruction locale de tumeurs sous contrôle IRM offre une nouvelle altérnative aux traite-ments classiques du cancer comme la chirurgie, la radio- et la chimio-thérapie. Parmi toutes les modalités d'induction d'une hyperthermie locale, seuls les ultrasons focalisés (USF) per-mettent une approche non-invasive. Le contrôle IRM de l'hyperthermie locale nécessite une cartographie de température rapide et fiable. La méthode basée sur la fréquence de résonance de protons de l'eau est préférée en raison de sa linéarité et de son indépendance par rapport à la nature du tissu. Les modifications loca

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von, Below Catrin. "PET and MRI of Prostate Cancer." Doctoral thesis, Uppsala universitet, Radiologi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-300940.

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Prostate cancer (PCa) is the most common non-skin malignancy of men in developed countries. In spite of treatment with curative intent up to 30-40% of patients have disease recurrence after treatment, resulting from any combination of lymphatic, hematogenous, or contiguous local spread. The concept of early detection of PCa offer benefits in terms of reduced mortality, but at the cost of over-diagnosis and overtreatment of indolent disease. This is largely due to the random nature of conventional biopsies, with a risk of missing significant cancer and randomly hitting indolent disease. In the

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Mehrtash, Alireza. "Needle Navigation for Image Guided Brachytherapy of Gynecologic Cancer." Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-248042.

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In the past twenty years, the combination of the advances in medical imaging technologies and therapeutic methods had a great impact in developing minimally invasive interventional procedures. Although the use of medical imaging for the surgery and therapy guidance dates back to the early days of x-ray discovery, there is an increasing evidence in using the new imaging modalities such as computed tomography (CT), magnetic reso- nance imaging (MRI) and ultrasound in the operating rooms. The focus of this thesis is on developing image-guided interventional methods and techniques to support the r

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Sales, Camila Pessoa de. "Implementação de planejamento tridimensional em braquiterapia de alta taxa de dose para tratamentos ginecológicos." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/85/85131/tde-13042015-091322/.

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Este trabalho visa implementar o planejamento tridimensional (3D) para tratamentos de braquiterapia ginecológica. Para isto, foram realizados testes de aceite e comissionamento do equipamento de braquiterapia para verificação de suas funções e para estabelecer um programa de garantia da qualidade periódico, assegurando assim a segurança dos pacientes e dos colaboradores. Uma etapa importante de ser realizada foi procurar um material que pudesse ser utilizado como dummy, já que os aplicadores utilizados não possuem dummy específica. Entretanto, somente com o emprego de uma biblioteca de aplicad

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Schuster, Linda. "Die Behandlung von Uterusmyomen mit magnetresonanztomographisch gesteuertem fokussiertem Ultraschall." Doctoral thesis, Humboldt-Universität zu Berlin, Medizinische Fakultät - Universitätsklinikum Charité, 2006. http://dx.doi.org/10.18452/15392.

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Fragestellung: Eine neuer, gänzlich nichtinvasiver Therapieansatz für die Behandlung von Myomen ist die MRT-gesteuerte Thermoablation mittels fokussiertem Ultraschall (HIFUS). Mit einer Phase-II-Studie sollten Verträglichkeit und Durchführbarkeit der Methode geprüft werden. Patientinnenkollektiv und Methoden: Im Rahmen einer internationalen Multizenterstudie wurden 11 prä- und perimenopausale Frauen mit deutlich vergrößertem und myomatös verändertem Uterus mittels MR-gesteuertem fokussiertem Ultraschall (Fa. Insightec Israel) behandelt. Studienziel war die Abschätzung von Durchführbarkeit und

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Rube, Martin. "Novel tools for interventional magnetic resonance imaging." Thesis, University of Dundee, 2014. https://discovery.dundee.ac.uk/en/studentTheses/7e3feb72-0102-431f-982a-b3cdd393994e.

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Magnetic Resonance Imaging (MRI) provides unique advantages such as superior soft tissue contrast, true multiplanar imaging, variable contrast mechanisms, measurement of temperature changes, perfusion and diffusion, and no ionizing radiation. Despite considerable research efforts in the field of interventional MRI, numerous challenges remain including restricted access to the patient, high acoustic noise and a shortage of MRI-safe devices. Novel methods and devices are presented in this thesis with the primary objective of enabling effective MRI-guided interventions, particularly abdominal nee

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Manivannan, Niranchana. "Use of Multiple Imaging Views for Improving Image Quality in Small Animal MR Imaging Studies." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1436753010.

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Daniels, Barret R. "Magnetic Resonance Guided Nasojejunal Feeding Tube Placement for Neonates." University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1439281638.

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Schornak, Joseph George. "A Minimum-Bending-Energy Needle Model for Closed-Loop Localization During Image-Guided Insertion." Digital WPI, 2018. https://digitalcommons.wpi.edu/etd-theses/311.

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Accurate needle placement is critical to the success of needle-based interventions. Needle deflection due to tissue non-homogeneity and dynamic forces results in targeting error, potentially requiring repeated insertions. Real-time imaging enables closed-loop control of the needle during insertion, improving insertion accuracy. The needle localization algorithm proposed in this thesis models the needle as a parametric polynomial equation optimized to minimize beam bending energy relative to a set of observed needle coordinates. Simulated insertions using an MRI dataset show that the minimum be

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Chen, Xin. "MRI MONITORING AND MODEL PREDICTION OF THERMAL ABLATION DYNAMICS IN TISSUE." Case Western Reserve University School of Graduate Studies / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=case1166155662.

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Lydiard, Suzanne. "Investigating the feasibility of magnetic resonance imaging guided cardiac radioablation for atrial fibrillation." Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/27354.

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Over 37 million people suffer from atrial fibrillation (AF). Catheter ablation is the main curative non-pharmacological treatment, but is invasive, technical, resource intensive, and success rates are moderate. Cardiac radioablation (CR) has been proposed as a non-invasive treatment alternative but further investigation is required before CR can be confidently and routinely used clinically. This thesis investigates the feasibility of magnetic resonance imaging (MRI) guided AF CR. Specifically, this thesis focuses on motion management within four main studies by: evaluating the feasibilit

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FEI, Baowei. "Image Registration for the Prostate." Case Western Reserve University School of Graduate Studies / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=case1224274091.

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Ojala, R. (Risto). "MR-guided interventions at 0.23T:facilities, user interface, guiding technology and musculoskeletal applications." Doctoral thesis, University of Oulu, 2002. http://urn.fi/urn:isbn:9514266382.

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Abstract Magnetic resonance imaging (MRI) has excellent soft tissue contrast, which can be enhanced by different contrast agents, multiplanar imaging capability and high temporal and spatial resolution. Even blood vessels can be easily visualised, and MRI parameters are sensitive to temperature. Therefore, MRI has the greatest potential for guiding and monitoring interventional and surgical procedures. The aim of this study was to design and evaluate new solutions for MR-guided procedures and surgery, to develop the technique and to assess the feasibility of MR-guided nerve root infilt

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Dorileô, Ederson Antônio Gomes. "Needle modeling, insertion planning and steering for CT or MR image-guided robot-driven percutaneous procedures." Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS222/document.

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L’objectif de cette thèse est l’étude et le développement d’un outil de planification de trajectoires adaptatives guidée par robot afin d’assister l’insertion des aiguilles biseautées semi-rigides en procédures percutanées sous imagerie scanner ou IRM. L’approche est basée sur un nouveau modèle de la déflexion de l’aiguille qui permet une prédiction hors ligne des déformations de l’aiguille et une amélioration des performances d’insertion en ligne. Cette amélioration permet de compenser les incertitudes sur les connaissances de l’environnement et les approximations lors de la modélisation de l

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Abdelaziz, Salih. "Développement d'un système robotique pour la radiologie interventionnelle sous IRM." Phd thesis, Université de Strasbourg, 2012. http://tel.archives-ouvertes.fr/tel-00801844.

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La réalisation de gestes percutanés dans l'IRM ouvre la voie à des pratiques médicales prometteuses. En revanche, l'utilisation de l'IRM reste à ce jour limitée, et ce malgré l'intérêt en terme de qualité d'image. Cela est dû principalement à l'étroitesse du tunnel et à la complexité des gestes réalisés. Pour rendre accessibles de telles pratiques, une assistance robotique semble très pertinente. Pour le concepteur, la réalisation d'un système robotisé compatible IRM n'est pas une tâche facile, étant donné l'espace disponible et la présence d'un champ magnétique intense. C'est dans ce contexte

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Mazzara, Gloria Patrika. "Brain tumor target volume determination for radiation therapy treatment planning through the use of automated MRI segmentation." [Tampa, Fla.] : University of South Florida, 2004. http://purl.fcla.edu/fcla/etd/SFE0000600.

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Roujol, Sébastien. "MR-guided thermotherapies of mobile organs : advances in real time correction of motion and MR-thermometry." Thesis, Bordeaux 1, 2011. http://www.theses.fr/2011BOR14263/document.

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L'ablation des tissus par hyperthermie locale guidée par IRM est une technique prometteuse pour le traitement du cancer et des arythmies cardiaques. L'IRM permet d'extraire en temps réel des informations anatomiques et thermiques des tissus. Cette thèse a pour objectif d'améliorer et d'étendre la méthodologie existante pour des interventions sur des organes mobiles comme le rein, le foie et le coeur. La première partie a été consacrée à l'introduction de l'imagerie rapide (jusqu'à 10-15 Hz) pour le guidage de l'intervention par IRM en temps réel. L'utilisation de cartes graphiques (GPGPU) a pe

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Cheng, Chou-Ming, and 鄭州閔. "Camera-Guided MEG-MRI Coregistration." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/40967964491540770043.

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碩士<br>國立陽明大學<br>放射醫學科學研究所<br>94<br>Magnetoencephalography(MEG) has been widely used to noninvasively and directly detect brain activity with high temporal resolution. Nevertheless, MEG lacks the anatomical information such that high spatial resolution tool, for instance Magnetic Resonance Imaging(MRI) can help to map the corresponding structure of neuronal activation detected by MEG. Thus coregistration of these two modalities is profitable to correlate the obtained functional activity with anatomical structure of the brain. In the conventional method, an operator is required to manually dete

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Seifabadi, REZA. "TELEOPERATED MRI‐GUIDED PROSTATE NEEDLE PLACEMENT." Thesis, 2013. http://hdl.handle.net/1974/8054.

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Most robotic systems reported for MRI-guided prostate interventions use manual needle insertion, based on a previously acquired image, which requires withdrawing the patient from the scanner multiple times during the procedure. This makes the intervention longer, more expensive and elongating the discomfort to patient and, most importantly, less accurate due to the virtually inevitable motion of the target. As a remedy, automated needle placement methods were proposed, putting human supervision out of the control loop. This thesis presents the development of enabling technologies for human-ope

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